Dumping-scow



ilNrrnn STATES PATENT OFFICE.

JOSEPH EDV'IARDS, OF BROOKLYN, NEI/V YORK.

SPECIFICATION forming part of Letters Patent No. 408,298, dated August 6, 1889. Application filed December Z1, 1888. Serial No. 294,338. (Ilo model.)

To @ZZ whom t may concern:

Be it known that I, JOSEPH EDWARDS, a citizen of the United States, residing in the city of Brooklyn, county of Kings, and State of' New York, have invented a new and useful Improvementin Dumping-Scows, of which the following is a specification.

My invention relates to the methodot holding, operating, and rendering tight-fitting the dumping-doors of that class of dirt-scows which discharge their cargoes through a se riesgof ports or openings in the bottom thereof, and especially those of such scows as are employed for handling fine sea-sand more or less mixed with water. It is found in practice that when fine sea-sand mixed with water is pumped into scows difficulty is encountered in rendering these discharging ports or doors sufficiently tight to hold the sand, which must be water-tight to prevent the escape of sand. Itis also found that when the scows are'thus freighted with fine sea-sand these discharging-doors will not open to discharge the cargo, owing to the fact that the sand becomes so compacted and consolidated that it is rendered immobile7 and, for the same reason, it also cuts oft the downward atmospheric pressure, which prevents these dump doors from opening unless they be forced downward by other means than gravity, which is not the case with the handlingof ordinary dirt and mud. esides, when chains are employed to hold the doors the compacted wet sand prevents the chains from sliding through it.

The object of myimprovement is to obviate this difficulty and to provide means for controlling the operation of the dumping-doors and rendering them watertight, which I accomplish by the device illustrated in the accompanying drawings, in which- Figure l represents a partial longitudinal elevation of the interior of the scow, showing two of the series of the dump-doors and the device for operating them; Fig. 2, a partial transverse elevation showing the same; Fig. 3, a plan view of one of the dump-doors and the hinges by which it is attached to the bottom of the scow, Fig. 4, a modification of a part of the means of operating the du1npdoo1's, and Fig. 5 also a modification of apart of the means of operating the dnmp-doors Similar letters refer to similar parts throughout the several views.

A A represent ports or dump-openings in the bottom of the scow between the framework A A of the scow.

B B is the bottom of the l1opper,'which terminates far enough above the bottom of the scow to form a recess to receive the dump-door D D, so that the door, when closed, will be ii ush with the bottom of the scow, and which furnishes a horizontal face or' .jamb'for the door to close against.

F F are hinges connecting one side of the door D D to the bottom ofl the scow.

E E is aheavy strip of yielding rubber fastened on all sides of the bottom of the hopper I3 B for the dump-door I) D to strike against to insure a watertight fit.

C is a connecting-rod between the doorD D and the sliding screw-rod G G. This connect ingrod C is fastened at the bottom end to the top ot the dum p-door D D by means of a working joint c c and c and at the top endby aworking joint (l to the sliding screw-rod G G. The screw-rod G G passes through the deck I-I H of the scow, upon which it is mounted in the frame I-I II.

I I is a casting bolted to the frame-work I-I HJ 'zT being a packed sleeve which guides and holds the rod G G and through which it slides. Upon the top of the frame H II is also fastened a similar casting 'i' fz, through which the rod G G passes, and upon the casting e" t" is bolted a casting J, into which is fitted a rotating threaded nut I, that works upon and operates the screw-rod G G. To this nut Iis fastened a large wheel with which to rotate the nut I. (Represented by K K.)

Fig. a represents a modified method of working the rod G G without a thread and nut, which maybe accomplished by apinion working in corresponding cogs on one side of the said rod G G, as illustrated.

Fig. 5 represents another modified method of working the rod G G, which is by means ot water-pressure in acting upon a piston attached to the rod G G and actuated by the pressure ot' water within the corresponding cylinder.

Having described the various parts of' my device and the functions thereof, the general explanation of the operation of my invention is briey explained as follows: The dumpingdoors D D are 'represented in the drawings as closed, in which position they are held by downward direction by the rotating nut I,

which said nut is Operated by the wheel K K. When the scow is to be discharged of its cargo, the screw-rod G Gis run down by rotating the nut I by rotating the wheel K K, which drives the connecting-rod C downward, which accommodates itself to the swinging motion of the door D D, and which forces the said door open. Vhen the cargo is discharged, the said doors are again closed by rotating the nut I in the opposite direction and thus running up the screw-rod G G, and by the action and power of the screw forcing the door D D so rml'y against the rubber strips E E as to make a perfectly water-tight fit between the said door and the bottom Of the hopper B B.

Iam aware that revolving nuts and screwrods h ve been employed for operating conic valves in dumping-scows in such a manner that the screw-rod and conic valve constitute one rigid structure. Therefore I do not claim, broadly, the use of a screw-rod and rotating nut for operating duinping-scow valves; but

What I do claim as new and useful,and desire to secure by Letters Patent, is

l. In a dumping-scow, the combination Of the rigid sliding rod G G, connecting-rod C, and swinging dump-door D D, the upper end Of the said connecting-rod being fastened to the lower end of the said sliding rod, and the lower end of the said connecting-rod being fastened to the upper side of the said dumpdoor, whereby the dump-door can be forced lOpen or closed by the vertical movement of the laterally-rigid rod, in the manner and for the purpose set forth.

2. In a dumping-scow, the combination Of the rigid sliding rod G G, having a screwthread and a vertically-stationary threaded nut I thereon, connecting-rod C, and swinging dump-door D D, the said connecting-rod having its upper end fastened to thelower end of the said sliding rod andits lower end attached to the upper side of the said du1np-door,where by the rotating of the said nut will give a vertical movement to the sliding rod and force down or draw up the connecting-rod and Open or close the dump-door, according to the direction in which the said nut is rotated, sub stantially as and for the purpose described.

JOSEPH EDWARDS.

I Vitnesses:

FRANK R. J OHNsON, HUNTINGTON PAGE. 

